Distribution of herbivorous fish is frozen by low temperature?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F16%3A00459603" target="_blank" >RIV/60077344:_____/16:00459603 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60076658:12310/16:43891364

Výsledek na webu

<a href="http://dx.doi.org/10.1038/srep39600" target="_blank" >http://dx.doi.org/10.1038/srep39600</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/srep39600" target="_blank" >10.1038/srep39600</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Distribution of herbivorous fish is frozen by low temperature?

Popis výsledku v původním jazyce

The number of herbivores in populations of ectothermic vertebrates decreases with increasing latitude. At higher latitudes, fish consuming plant matter are exclusively omnivorous. We assess whether omnivorous fish readily shift to herbivory or whether animal prey is typically preferred. We address temperature as the key factor causing their absence at higher latitudes and discuss the potential poleward dispersion caused by climate changes. A controlled experiment illustrates that rudd (Scardinius erythrophthalmus) readily utilize plant matter at water temperatures above 20 degrees C and avoid its consumption below 20 degrees C. Field data support these results, showing that plant matter dominates rudd diets during the summer and is absent during the spring. Utilizing cellulose requires the enzyme cellulase, which is produced by microorganisms growing at temperatures of 15-42 degrees C. Water temperatures at higher latitudes do not reach 15 degrees C year-round; at our latitude of 50 degrees N similar to 150 days/year. Hence, the species richness of omnivorous fish decreases dramatically above 55 degrees latitude. Our results provide support for the hypothesis that strict herbivorous specialists have developed only in the tropics. Temperatures below 15 degrees C, even for a short time period, inactivate cellulase and cause diet limitations for omnivorous fish. However, we may expect increases in herbivory at higher latitudes caused by climate change.

Název v anglickém jazyce

Distribution of herbivorous fish is frozen by low temperature?

Popis výsledku anglicky

The number of herbivores in populations of ectothermic vertebrates decreases with increasing latitude. At higher latitudes, fish consuming plant matter are exclusively omnivorous. We assess whether omnivorous fish readily shift to herbivory or whether animal prey is typically preferred. We address temperature as the key factor causing their absence at higher latitudes and discuss the potential poleward dispersion caused by climate changes. A controlled experiment illustrates that rudd (Scardinius erythrophthalmus) readily utilize plant matter at water temperatures above 20 degrees C and avoid its consumption below 20 degrees C. Field data support these results, showing that plant matter dominates rudd diets during the summer and is absent during the spring. Utilizing cellulose requires the enzyme cellulase, which is produced by microorganisms growing at temperatures of 15-42 degrees C. Water temperatures at higher latitudes do not reach 15 degrees C year-round; at our latitude of 50 degrees N similar to 150 days/year. Hence, the species richness of omnivorous fish decreases dramatically above 55 degrees latitude. Our results provide support for the hypothesis that strict herbivorous specialists have developed only in the tropics. Temperatures below 15 degrees C, even for a short time period, inactivate cellulase and cause diet limitations for omnivorous fish. However, we may expect increases in herbivory at higher latitudes caused by climate change.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EG - Zoologie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Scientific Reports

ISSN

2045-2322

e-ISSN

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Svazek periodika

6

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

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Kód UT WoS článku

000390267200001

EID výsledku v databázi Scopus

2-s2.0-85006988540